JPS583834Y2 - Bearing of rotating rod in pantograph jack - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a bearing device for a rotating rod in a pantograph jack.

Traditionally, a pantograph jack was always kept in one corner of the car as a part of the car's equipment.As energy conservation has become an issue in recent years, vehicles have become lighter, and tens of thousands of car assembly parts have been used. If it is possible to reduce weight by even a few grams per point from all points, then tens of kilograms can be reduced per vehicle, which will not only improve vehicle performance but also further reduce vehicle weight. The aim is to strengthen the product, while also reducing weight, which in turn leads to lower production costs.
It takes even more momentum.

One of the ways to reduce weight is to focus not only on the vehicle itself, but also on all the accessories that the vehicle always has.

This invention aims to reduce the weight as one of the above-mentioned weight reduction and related general objectives, and also aims to reduce the unit price in proportion to the reduced weight.

As mentioned above, this idea was devised as a part of weight reduction, and the weight of the parts that resulted from this idea was reduced by a small amount in proportion to the total weight of the pantograph jack itself, but it is not a large amount at all. As mentioned above, even if the amount of reduction is small, the objective can be achieved.

As is well known, a pantograph jack is composed of main components including a foot plate, four support rods, an operating rod, a pressure plate, and a bearing mechanism connecting each of the support rods and the operating rod.

This invention relates to an improved bearing mechanism among the main members, which pivotally supports each support rod and is capable of transmitting the action of the operating rod.

The conventional bearing mechanism involves cutting a metal rod of the required diameter to the length of the member to be supported, drilling pin holes at both longitudinal ends of the rod, and
A so-called "solid" material is used in which a working rod engaging portion perpendicular to the longitudinal direction is perforated.

In contrast, this invention consists of a composite structure of metal plates.

Next, before and after explaining the embodiment of this invention, the outline of the pantograph jack will be explained with reference to Fig. 1.
The lower ends of each of the two lower support rods 2, 2 are pivotally supported by two parallel pivot pins to a bearing part standing parallel to the upper part of the foot plate 1, and are provided around the pivot part. A bearing mechanism A is provided at the upper end of each of the lower support rods 2 which are engaged with each other by a gear-like meshing portion.

The lower ends of each of the upper support rods 3 are pivotally connected via B,
Its upper end is engaged with a gear-like meshing part in the same way as the lower end of the lower support rod 2, and the center part of each gear is connected to a bearing part provided at the lower part of the pressure plate 4 with a pin. The pins are pivotally connected in parallel to form a pantograph rod, and in addition to this, in the bearing mechanism A, an operating rod 6 having a male screw 5 carved on the outer periphery over most of its length is provided. In addition to rotatably supporting the part where the screw 5 is not provided, in the male threaded bearing mechanism B, the screw 5 is screwed together, and the jack itself is raised and lowered by the rotational movement given to the operating rod 6. It is configured to perform movement.

This invention relates to the bearing mechanism A and the female threaded bearing mechanism B in the pantograph jack configured as described above.

The bearing mechanism A and the female threaded bearing mechanism B are made of a steel plate, which is cut into a required shape as appropriate, and then formed into an inverted U-shape to form an outer piece 10, and can be placed in close contact with the inside of the outer piece 10. In both members of the shaped inner piece 11, both parallel and opposing sides are connected to the pin receiving portion 12.
At the stage when these two members are superimposed, a pin hole 13 penetrating through the - line is bored, connecting the pin receiving parts 12 on both sides, and the pin hole 13 is connected to the pin receiving part 12 on both sides, and the pin hole 13 is made in the outer piece 10 on the surface corresponding to the ceiling position. The operating rod 6 is inserted in a direction perpendicular to the axis line of the hole 13
An operating rod engagement groove 1 into which approximately the radius of the thickness can be inserted.
5 on the inner surface, that is, the plate shape is formed by pressing or the like so that the plate shape protrudes outward at the same time as the pin receiving part 12 and the bearing surface part 14 are formed, and the inner surface corresponding to this outer piece 10 is In the piece 11, an operating rod engaging groove 15' corresponding to the operating rod engaging groove 15 provided in the outer piece 10 is formed in the bearing surface 14 by the same operation as the outer piece 10. The formed outer piece 10 and inner piece 11 are integrated with each other by an appropriate construction method such as caulking or welding by matching their essential parts to form a bearing mechanism.

In this case, as mentioned above, the bearing mechanism A is formed so that the shaft hole 16 can simply be supported by the part of the operating rod 6 where the male thread 5 is not provided, but the part with the female thread In the bearing mechanism B, a male screw 5 carved into the operating rod 6 is used.
It is necessary to provide a female thread 1T that can be screwed together.

Therefore, regarding the inner diameters of the shaft hole 16 and the female thread 17, operating rod engaging grooves 15° and 15' should be formed in accordance with the diameters of the respective engaging portions of the operating rod 6.

Also, if we talk about other embodiments of both the bearing mechanism A and the female threaded bearing mechanism B, the inner piece 11 is not provided as described above, and the main body is only the outer piece 10, and in this case, the operating rod The direction in which the mating groove 15 is formed is arbitrary, either outside or inside. The bearing surface portion 14 thus formed is integrated with the other bearing surface portion 14 which faces each other as described above by means such as riveting or welding, and also has a female thread. To construct the bearing mechanism B, a female thread 17 is carved on the inner surface thereof.

The bearing mechanism A and the female threaded bearing mechanism B constructed as described above are constructed so as to be able to perform a predetermined function at a predetermined position in the pantograph jack as described above.

This idea was developed by cutting the conventional metal rod to the required length for both bearing mechanisms in the pantograph jack, as described above.
In contrast to the so-called "solid" material that is formed by cutting, the material is a steel plate, and the processing method is mainly press processing.
By using steel plates as the material for conventional bearing mechanisms, this design can significantly reduce the weight compared to conventional products, and as mentioned above, by using steel plates as the material, , compared to the cutting process of conventional products, most of the processing methods are press working, which simplifies the process, so it can be supplied at low cost and is effective in achieving the intended purpose. It is something.

[Brief explanation of the drawings] Figure 1 is a schematic front view of the pantograph, Figure 2 is an overall perspective view of the bearing mechanism, Figure 3 is a front view, and Figure A simply shows the bearing hole. FIG. 4 is a perspective view showing another embodiment, showing a bearing hole provided with a female thread. 1... Foot floor plate, 2... Lower support rod, 3
...... Upper support rod, 4... Pressure receiving plate, 5.
...Male screw, 6...Operating rod, 12.
...Pin receiving part, 13...Pin hole, 14.
...Bearing surface part, 15, 15 ... Operating rod engagement groove, 16 ... Shaft hole, 17 ... Female thread, A ...・Bearing mechanism, B...Bearing mechanism with acid thread.

Claims (1)

[Scope of utility model registration request] The steel plate material is cut into the required shape, bent into an inverted U-shape, made parallel, and facing each other to form the pin receiver portions 12.12. A bottle hole 13° 13 with the axis centered at - is provided, and the cross section is so large that about a hand circumference of the diameter of the operating rod 6 can be inserted into the part that forms the ceiling that connects both pin receiving parts 12 and 12. A semicircular operating rod engagement groove 15 is provided in a direction perpendicular to the line connecting the pin holes 13, 13, and the substantially semicircular operating rod engagement groove 15 is made of a different material. With the same radius as groove 15,
In addition, an operating rod engaging groove 15' having an arc that is insufficient to make the operating rod engaging groove 15 a perfect circle is provided in the center, and pin receivers are provided on both sides of the operating rod engaging groove 15' other than the operating rod engaging groove 15'. 11.11 on both sides of the operating rod engaging groove 15, and the operating rod engaging groove 15 and the other operating rod engaging groove 15'.
The two members are joined together by caulking or welding so as to form a shaft hole 16 that surrounds the entire circumference of a predetermined portion of the operating rod 6 in a perfect circle and can perform a bearing action, and then A male screw 5 having the same structure as the bearing mechanism A and provided on the inner periphery of the shaft hole 16 and a part of the outer periphery of the operating rod 6 is formed. A bearing for a rotatable rod in a pantograph jack is provided with a female thread 1T that can be screwed together to form a female threaded bearing mechanism B, and the bearing mechanism A and the female threaded bearing mechanism B are combined as a set.